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A small form factor, 79 GHz, MIMO radar sensor with 2D angle of arrival estimation capabilities was designed for automotive applications. It offers a 0.05 m distance resolution required to make small minimum distance measurements. The radar dimensions are 42×44×20 mm3 enabling installation in novel side locations. This aspect, combined with a wide field of view, creates a coverage that compliments...
This paper tests and demonstrates the ability of a twin set of passive radar systems to monitor real time an area of interest and track medium size targets. The results are based on a real data acquisition campaign performed using two eleven element array antenna based passive radars in the Oslo fjord area in September 2016.
This article describes CUDA computing architecture, as an effective tool for digital beamforming in radar systems. The goal of this article was to present results of implementations that represents different approaches to this issue. In this article authors also presented different methods of increasing the efficiency of the implemented algorithms.
Amplitude and phase imbalance (IQ imbalance) seriously degrades the performance of FMCW radar systems with quadrature demodulator. The non-ideality of the radar signals has two main effects: The single-channel IQ imbalance leads to an image peak in the FMCW spectrum, resulting in wrong detections. The IQ imbalance between channels affects the direction-of-arrival (DOA) estimation, as the array manifold...
In this paper technical advances towards future broadband digital frontends are presented and discussed. Technical challenges on this path, such as ultra-wideband digital sampling, architectures for wideband frequency coverage, System on Chip technologies for digital beamforming, broadband antenna apertures including GaN / SiGe TR-Module technologies are addressed. Hensoldt's technological progress...
Passive radar uses illuminators of opportunity instead of a dedicated radar transmitter. A number of already transmitted signals can be used, however, their nature is mostly continuous and their utilization is a complicated task. One of the key limiting factors of passive radar is the strong direct signal interference (DSI), even though many physical and signal processing countermeasures have already...
This paper presents a new development of a 24 GHz radar frontend with a Rotman Lens as a beamforming network. The main objective of the project is the accurate detection and localization of multiple targets at the same distance from the radar system. Interferometric systems determine the direction for a target with the phase difference through at least two receiving antennas. If multiple targets are...
Aiming to solve the difficulty involved in wideband beamforming for conformal arrays, a novel adaptive frequency invariant beamforming algorithm is proposed in this paper. In this algorithm, the pre-steering delays of the traditional Frost beamformer are firstly removed by utilizing a new constraint matrix, which also incorporates the element patterns into the adaptive algorithm. Then, the interference-plus-noise...
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